Module constants

Constants

• KEY_PARAM_APP_NAME
  param appName, use for crate::api::config::ConfigService::publish_config_param
• KEY_PARAM_BETA_IPS
  param betaIps, use for crate::api::config::ConfigService::publish_config_param
• KEY_PARAM_CONTENT_TYPE
  param type, use for crate::api::config::ConfigService::publish_config_param
• KEY_PARAM_TAG
  param tag, use for crate::api::config::ConfigService::publish_config_param